Ok. I will order one and try it in the fullness of time. Based on your obvious extensive experience.
On the matter of the atmospheric pressure sampling vent on the side of the WJ57 carburettor; what size tube should I fit? I suppose the largest possible, is that correct? I may be able to get and 8 mm line in there (5/16 in the old world measurement). Do you think that will be large enough for this carb?
Thinking about it over the last 24 hours or so, I am banking my hope on this being the cause of the intermittent miss-fire. I dearly hope it is not the ignition system.
Thanks again AV8TOR.